3
votes
1answer
1k views

How do I securely deal with SSL certificate validation failure when the client date is incorrect?

I have an application that runs in mobile devices and connects to my server via HTTPS. At times the connection fail because the device has a date set in the past (before the 'valid from' date on my ...
-3
votes
1answer
279 views

Is there a way to attack the SHA-3, GOST, and WHIRLPOOL hash functions? [closed]

Is there a way to attack SHA-3, GOST, and WHIRLPOOL hash functions?
2
votes
2answers
402 views

Identifying SSL traffic?

How does DPI basically identify SSL data traffic? Just by the number “443” in port section or the SSL traffic has some other particular properties other than “443”? Thanks in advance,
-2
votes
1answer
62 views

Whether heartbleed is attaked while we are using heartbeat with apache(httpd)? [closed]

We are using heartbeat for high availability of httpd. In httpd we are using openssl of version 0.9.8 but about heartbeat i dont much about that but while search in google some sites are sayong that ...
-1
votes
1answer
391 views

Determine if Tor works

I have installed Tor on my Mint computer, but how do I determine if Tor is working? When I visit http://whatismyip.com, my old IP is shown. Should it not be a different IP when I'm using Tor? Here is ...
1
vote
4answers
210 views

How different should passwords be?

It seems to be generally accepted the same password should not be used for different sites or devices. How different should passwords be? For example +_^gum<JW1 and +_^gum<JW2 are very similar. ...
1
vote
2answers
384 views

Repercussions of hacked router?

I am staying in Thailand right now on a "long holiday" to do some work on my laptop. A few weeks I noticed that at the condo where I am staying, sometimes I am redirected to ad sites. I researched it ...
0
votes
0answers
958 views

OpenSSL: Bad Record MAC on TLS Heart Beat

I am trying to see the heartbleed bug in action with my OpenSSL server application. My server uses the OpenSSL library - openssl-1.0.1b I successfully connect with s_client (openssl-1.0.1b) to my ...
1
vote
1answer
528 views

Audiobooks to learn about Infosec? [closed]

I recently got homeland on a humble bundle and I've been getting really interested in Information Security so i want to keep learning and the best way i find is to listen to Audio books or podcast ...
1
vote
2answers
480 views

If I change any character in a private PEM, should the public PEM be different?

I'm generating a public PEM-format key from a private PEM-format key. I noticed that if I change a few characters near the end of the private PEM that the public PEM generated from the modified ...
58
votes
7answers
6k views

Can “cat-ing” a file be a potential security risk?

I often use cat on the console to view the contents of files, and every now and then I accidentally cat a binary file which basically produces gibberish and system beeps. However today I've ...
1
vote
1answer
687 views

Prevent CSRF using ViewState?

According to OWASP you can prevent CSRF in a ASP.NET application if you include the SessionID in the ViewState. From the article: Viewstate can be used as a CSRF defense, as it is difficult for ...
1
vote
1answer
100 views

Is there a value in using portable programs on a USB key?

If I am working writing a text document in a text editor (say notepad or MS word, or ...) then I can save the file and the encrypt this file. I can then try to erase the original file by overwriting ...
1
vote
2answers
699 views

How does anti-phishing software work to identify phishing sites?

To clarify, my question isn't on how to protect myself from phishing. What I'm curious about is how exactly software can identify whether or not a website is designed for phishing, ignoring word ...
1
vote
1answer
94 views

How do you manage credentials to multiple remote systems?

We are a vendor that provides software to the healthcare industry, and our application is locally hosted on customer infrastructure. As such, we are provided with VPN access in order to be able to ...
28
votes
6answers
22k views

Is this “Domain Registration Service” email a scam?

I received an email to the email address listed on our website (it's a generic info@ourcompany.com to help "weed out" spam, whereas each employee has something like andreas@ourcompany.com to which I ...
2
votes
1answer
738 views

Field-level encryption vs disk encryption for PCI compliance

We are in the process of setting up a PCI compliant server (with Firehost's help). We are using MongoDB as our primary database. I am having some concerns about the encryption, though. Are there any ...
0
votes
2answers
384 views

Encrypting files in .NET?

I am in a situation where I would like to encrypt audio and text files for an application I am working on. I did some looking around and from what I have seen the Rijndal encryption algorithm would ...
2
votes
2answers
292 views

SQL injection: real escape string function

example4.php?id=id=2-1 I came across the above injection and I can not figure out why(how) does this work and what's interesting is it returns all the records from the database. Anything guys? ...
14
votes
1answer
2k views

SSH: benefits of using hashed known_hosts

What are the benefits of storing known_hosts in a hashed form? From what I read, it is supposed to protect the list of servers I am connecting to, presumably in a scenario where my account has been ...
0
votes
1answer
4k views

Enabling port forwarding on port 53 on a DNS server, why is it a risk?

Well, actually I know that the risk is that somebody from an external network could access IPs and hostnames of the machines on a local network, but I am struggling to understand if this is it or if ...
5
votes
1answer
269 views

HeartBleed and Closed Source Hardware like Cisco

With the release of heartbleed how does one protect themselves with closed source networking hardware like cisco? Especially hardware with VPN variety. Would it be best to replaced such systems with ...
0
votes
1answer
1k views

How does Shodan crawl internet-connected devices?

I wonder how Shodan crawls internet-connected devices and adds them to its database. I know Google, for instance, finds new websites by following links in websites it already found, but that strategy ...
2
votes
2answers
521 views

How to detect Snort on the network?

Does anyone know how to fingerprint an IPS ? is there any tool available to do the job? I want to detect snort in my network . Would appreciate any kind of help.
0
votes
1answer
334 views

Python SSH vs SSL? [duplicate]

I read the What is the difference between SSL vs SSH? Which is more secure? , and it mentions there is the possibility they can be affected by similar attacks. Now that the heartbleed thing is out, ...
0
votes
1answer
319 views

Sql Injection and no priviliges to write files [closed]

I have a sql injection in my site and im using sqlmap but when i try --os-shell it says cannot write file due to permissions . now is it impossible to write a file to the server?
0
votes
1answer
482 views

Outbound Port 443 Open but Not Allowing SSH [closed]

My college wireless network has a firewall blocking all outbound ports except 443 and 80. The wired network, however, has none of these restrictions. I can connect to HTTPS sites (obviously). On my ...
1
vote
0answers
165 views

Instant Messaging End-to-End

I plan to create an application for secure instant messaging, now I don't know whether or not I want to implement the encryption by myself. This project is also mainly for educational purpose so I ...
2
votes
4answers
6k views

Secure connection failed (OCSP)

I've been getting a lot of failed connections lately, namely from Facebook and now Google (German site works, French does not). This happened to other sites as well but these two are the kind you ...
0
votes
0answers
25 views

Length-constant password comparison in scrypt? [duplicate]

E.g.: XORing the candidate against stored then comparing against 0. Do I need to worry? (my question is much in the same style as this question: Does bcrypt compare the hashes in "length-...
7
votes
3answers
728 views

Risk in buying an SSL cert from a not well-known party

Let's say I know a guy is selling an SSL cert at a very low price, assume they will generate a real and valid cert for me, since I need to submit my CSR to them and they pass to the CA, are there any ...
3
votes
2answers
9k views

NTLM/LM Hashes on Domain Controller

I've noticed that when extracting password hashes from a domain controller (using Elcomsoft proactive password auditor) sometimes I'll get LM and NTLM hashes and other times I'll only get NTLM hashes. ...
1
vote
1answer
223 views

Web Application Authentication Using Computer Properties

Introduction: I am in the process of building a web-based game that requires user authentication. The vast majority of other gaming sites utilize the typical username/password method for ...
1
vote
1answer
142 views

Using Fiddler to capture few important Details

I want to implement the following requirement. In an online Bank Transaction, a User wants to send an amount of $1000 to an Account A. I want to see that the request is going unmodified to Banking ...
4
votes
2answers
559 views

Keepass Dictionary Attack Protection Strategy

Though pretty interested, I'm everything but an expert in Information Security, please redirect me to any helpful resources if my question is stupid or correct me if my assumptions are wrong. When ...
12
votes
1answer
7k views

What are the OpenSSL standard Diffie Hellmann parameters (primes)?

I recently generated some custom Diffie Hellmann parameters which are basically just long (in the below case 4096 bit) primes. Those are then used in the key exchange process. I used the following ...
4
votes
1answer
474 views

How secure is JavaScript based OAuth 2.0

JavaScript based OAuth exposes the client ID of the application and it trusts only on the domain requesting the access token. The domain name can be forged with a DNS hijack (or a virus affecting /etc/...
1
vote
1answer
472 views

Linux kernel 3+ system call table modification detection [closed]

Is there any available tool which can check kernel 3+ system call table for modifications? Also I want to know, is there any automated general tool to check Linux for unknown rootkits? Not like ...
8
votes
2answers
2k views

Does the ARM TrustZone technology support sealing a private key under a code hash?

One of the extremely valuable functions of a Trusted Platform Module (TPM) chip is its ability to seal a private key under the hash of the code that will use it. This means that one can create a ...
3
votes
1answer
262 views

Metasploit Pivoting on loopback?

I'm pen-testing a Windows 7 machine, and have access to a limited remote shell. I can see there's a vulnerable SMB service running on the machine's loopback, but it's not available externally. Is ...
1
vote
1answer
71 views

Evaluation of cryptosystem for authentication and keyexchange

I'm a masters student in computer science who works part time with my own company as a consultant. My lastest project is based on my bachelor thesis which handles everything except the security. The ...
0
votes
1answer
2k views

Apache 2.2 mod_ssl configuration Forward Secrecy/BREACH/BEAST/CRIME

I am looking for mod_ssl configuration which protects against common attacks like Breach, Beast and Crime. I already disabled gzip to avoid Crime but I'm unsure about the others. RC4 should only be ...
4
votes
2answers
280 views

Can Heartbleed expose a TOR user's IP address?

It is interesting to observe, that TOR exit nodes with out-of-date OpenSSL implementations can themselves be affected by the Heartbleed bug. Can Heartbleed expose a TOR user's IP address merely by ...
1
vote
1answer
273 views

Allow loopback in Iptables?

I'm trying to write Iptables rules for a small web server. Almost every source I've encountered recommends to allow loopback access to the web server, but doesn't explain why this is necessary. What'...
-2
votes
1answer
623 views

How to decrypt javascript code extracted from PDF

I analyzed PDF, and extract javascript code. But javascript code is encrypted. I can't decrypt it. Please advise me. javascript code \040\040\040\040\146\165\156\143\164\151\157\156\043\164\151\...
4
votes
0answers
44 views

How does BGP filtering work to prevent routing hijacking? [duplicate]

I've been reading for a while but yet do not properly understand how is BGP filtering used to prevent "attacks" such the recent Indosat's problem. Do not copy&paste Cisco's site, I have read all ...
4
votes
0answers
177k views

Hack into a computer through MAC and IP address [closed]

Is my computer vulnerable to someone who knows my modem's MAC address and my public IP address? What kind of vulnerabilities would this imply? Could they actually get access to my computer just with ...
1
vote
1answer
56 views

Encrypting multiple blocks with an asymmetric scheme

I have a general question how asymmetric schemes are usually implemented. Typically, there is a parameter in an asymmetric scheme which limits the message length. For example the modulus in RSA. I ...
1
vote
2answers
211 views

How to know what personal information companies know about myself

I've been learning about Cyber Security and how to protect myself online after reading some books on the subject and I want to know how much Information i've handed out to companies.
2
votes
3answers
442 views

Wipe free space or take image and wipe entire disk?

Read some of the stuff here regarding wiping disks and securely deleting files. From what I've understood, after deleting (not securely) files they become part of the unallocated(free) space of the ...

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